Validation of a low-dose hybrid RSA and fluoroscopy technique: Determination of accuracy, bias and precision

Journal of Biomechanics
James IoppoloBo Nivbrant

Abstract

Analyzing skeletal kinematics with radiostereometric analysis (RSA) following corrective orthopedic surgery allows the quantitative comparison of different implant designs. The purpose of this study was to validate a technique for dynamically estimating the relative position and orientation of skeletal segments using RSA and single plane X-ray fluoroscopy. Two micrometer-based in vitro phantom models of the skeletal segments in the hip and knee joints were used. The spatial positions of tantalum markers that were implanted into each skeletal segment were reconstructed using RSA. The position and orientation of each segment were determined in fluoroscopy images by minimizing the difference between the markers measured and projected in the image plane. Accuracy was determined in terms of bias and precision by analyzing the deviation between the applied displacement protocol and measured pose estimates. Measured translational accuracy was less than 100 microm parallel to the image plane and less than 700 microm in the direction orthogonal to the image plane. The measured rotational error was less than 1 degrees . Measured translational and rotational bias was not statistically significant at the 95% level of confidence. The techni...Continue Reading

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Citations

May 23, 2008·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Victor KosmopoulosConstantin Schizas
May 1, 2009·Journal of Biomechanics·Angela E KedgleyThomas R Jenkyn
Dec 22, 2007·Journal of Biomechanics·Rongyi CaiDavid W Holdsworth
Mar 18, 2016·Archives of Orthopaedic and Trauma Surgery·Friedrich BoettnerMartin Faschingbauer
Aug 8, 2009·Journal of Biomechanics·Elise K LaendeMichael J Dunbar
Jul 1, 2016·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Stuart A CallaryDonald W Howie
Jul 8, 2020·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Ana BascuñánStanley E Kim
Feb 11, 2012·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·D C AcklandM G Pandy

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